Siemens Energy has signed an agreement with China National Petroleum (CNPC) to supply electrical engineering and electrical systems for the first phase of the Guangdong Petrochemical Refinery in China.

The refinery will be constructed in Jieyang in the southern Chinese province of Guangdong, and upon completion the facility will be able to process 20 million tons of heavy oil per year.

Siemens Energy Oil & Gas Division CEO Adil Toubia said, "For Siemens, winning this major refinery project marks a milestone in the context of our ongoing cooperation agreement with CNPC."

Under the contract, Siemens will supply electrical equipment and all control systems for the entire refinery, including SF6 gas-insulated switchgear stations (GIS) with a rating of 220kV, as well as 220kV /110kV power transformers and 35kV/10kV distribution transformers.

The company will also provide basic automation systems, PCS7 control systems, 35kV gas-insulated and 10kV air-insulated switchgear.

It will also provide protection and relay devices to complete the current distribution order.

As per the terms of a strategic cooperation agreement signed with CNPC in 2012, Siemens will also provide compressors for the air separation process and wastewater treatment solutions for the project.

The first stage of the plant complex is scheduled for commissioning in late 2015.